The fallout could affect more than just home computers. An estimated 29 percent of the world’s computers use the operating system and this affects businesses far more than personal computers.

An estimated 95 percent of bank ATMs use Windows XP and only about 15 percent will be upgraded by April 8, according to Bloomberg Businessweek. The ATMs that use Windows XP Embedded, a stripped down version of the operating system, will no longer be in compliance and will need to be upgraded to Windows 7. Some could be upgraded over the network while others will have to be updated or replaced, according to Bloomberg.

Wells Fargo Bank, the third largest banking operations in North Texas in terms of deposits, released a statement on the issue and declined to comment further.

“We’re working with Microsoft and our ATM manufacturers to upgrade our ATM’s as part of our normal software refresh activities.”

Chase, the region's second largest bank, will start converting ATMs to Windows 7 this summer, a project that will take through the end of the year. A small percentage of ATMs will have to be replaced as part of the upgrade.

"We will continue to invest and innovate to make sure we have the most convenient and technologically-advanced services, including ATMs, online and mobile banking," said Greg Hasell, a Chase spokesman.